Green 140 hearing aids Mini Ear Sound Hearing Aids Apollo 145 high quality hearing aids Hearing aids are a kind of loudspeakers that help the hearing impaired to improve their hearing and improve their verbal communication skills. Hearing aids are available in box, eyeglass, behind-the-ear, in-ear, and ear canal hearing aids, among which in-the-ear hearing aids are currently the most widely used. Complete ear canal hearing aid: It is the smallest hearing aid in the world. It is placed in the deep ear canal and is completely undetected. It is called “invisible hearing aid”. It is not easy to find that it is loved by young people because it is hidden.